Type-writing machine



(No Model.)

G. W. N. YOST.

TYPE WRITING MAGHINE.

No. 428,294. PatgatedwMay 20, 1890.

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UNrrnD STATES PATENT tricei GEORGE NV. N. YOST, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE AMERICAN VRITING MACHINE COMPANY, OF NEYV YORK.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 428,294, dated May 20, 1890.

Application filed July 12, 1880. Serial No.13,384. (No model.)

To @ZZ whom, it may concern:

Be it known that I, GEORGE WV. N. YOST, of the city, county, and State of New York, have invented Improvements in Type-XVriting Machines, of which the following is a specication.

The invention is illustrated and described in the accompanying drawings and following description thereof; and it consists in the ro combinations of devices hereinafter more fully described, and particularly pointed out in the appended claims.

Of the drawings, Figure l represents a lon gitudinal vertical sectional view of a type-writr5 ing machine which embodies the invention; Fig. 2, a top view of the under part thereof, and the remaining eight figures views of detached parts thereof.

Of the drawings also, A represents the main- 2o frame side plates of a type-Writing machine which embodies the invention; A2, the top plate on the side plates A; A0, a board or plate across on the bottom of the side plates A; A4, a bar at the rear and bottom across' 2 5 on the side plates A; A5, a rod or fulcrum at the front across in the side plates A;'A6, a series of guide-pins extended up from the bottom plate A5 in -rear of and near to the fulcrum A5 in line between the side plates A;

3o A7, a cover or plate over the front ends of the side plates A; A5, a ring or circular orifice Y in the top plate A2; A0, a rail across over the rearpart of the top plate A2; A10, another rail across over the front part of the top plate A2;

B, a hanger or series of hangers on the top plate A2, around the orifice A5; B2, a type-bar Y hinged to each hanger B; C, a long lever or series of levers, each between two guide-pins A6 within the side platesA; C2, a bearing in 4o the fore end of each long lever C, over and on the fulcrum A5; C5, a connecting-point on the hind end of each long lever C; C4, a type-key or finger-key on each long` lever C between the bearing C2 and connecting-point C2; C5, a

wire loop-spring astride the fore end of each key-lever C and extended down Vin front and under and to the rear of the f ulcrum A5 on the bottom plate A5; D, a swivel attached to each key-lever connecting-point C5; D2, a screw- 5o thread `on the upper end or shank of each swivel D; E, a connecting-rod attached to on the lower end of each connecting-rod E; F, a sleeve o n the contiguous ends of each corresponding swivel D and connecting-rod E; I5 2, an internal screw-thread in each end of each sleeve F; G, a right-angled vibratory frame hinged at the bottom and rear between the side plates A, with one part ext-ended toward the front un'der the key-levers C and the other part extended toward the top plate A2; G2, a baron the fore end of the vibratory frame G across, under, and up against the key-levers C; G5, a spring on the bottom plate A3 and pressed up against the vibratory frame G; H, another long lever on each side of the type key-levers C and extended from the front back to and on the vibratory-frame cross-bar G2; H2, a pivot in the fore end of each side lever H; HB, a iinger-key or spacekey on each side lever H abreast of the keylever type-keys C4; H4, a spring under and pressed up against each side lever H; H5, a supplementary spring under the rear part of each side lever H; H0, an adj usting-screw in each supplementary spring H5; M, acarriage on the rails A0 A10 over the top plate A2; M2, the front side bar of the carriage M; M5, the rear side frame of the carriage M; M4, a traveling wheel on the carriage front side bar M2, extended down to and on the top plate frontrail A10; M5, slide-bearings in the carriage rear side frame M5, and on and over the rear top-plate rail A0; N, a cylindrical platen, in bearings, on the carriage M across over the top-plate orifice A5; N2, a spur-Wheel on the end of the platen N; O, a small roller on the carriage M in rear of the platen N; O2, a small spur-Wheel on the end of the small roller O, meshed into the platen spur-Wheel N2; O5, a spring attached to each end of the small roller O and to the carriage M, and adapted to press the roller against the platen N; P, a combined lever and handle hinged to the carriage front side bar M2,-Which is bent and has one end extended toward the rear and the other down in front toward the key-levers C; P2, a driving-ratchet hinged on the upper end of the handle-lever P and extended into the platen spur-Wheel N2; P5, a holding-ratchet on the carriage M behind the each type-bar B2 and extended down to the corresponding swivel D; E2, a screw-thread ICO platen N and extended into the platen spurwheel N2; Q, a cam-like regulator hinged on the carriage M and extended over and on the handle-lever P; Q2, a handle on and extended up from the regulator Q; Q3, a pin or lug on the regulator Q and extended out laterally parallel with t-he axis of the platen N; Q4, a curved vertical spring, of which the bow or convex is on the front side behind and pressed against the regulator-lug Q3; R, a toothed rack rigidly attached to the carriage lrear side frame lV 3; R2, a hanger hinged to and extended down from near each end of the carriage rear side frame M3; R3, another toothed rack beside and like the first toothed rack R, an d hinged to the hangers R2; R, a spring, which has one end attached to the lirst rack R and the other to the second rack R3; S,a long rod extended from front to rear in bearings under the middle of the bottom plate A3; S2, a vertical bar hinged to the hind end of the long rod S and extended up abreast of the carriage M; S3, a connecting-rod hinged both to the carriage M and upper end of the vertical bar S2; T, a coiled-wire spring from end to end of the long rod S, which has one end attached to the fore end of the inclosed rod and the-other to the lower end of the Vertical bar S2; T2, a ratchet-wheel on the fore end of the long rod S; T3, a holding-ratchet on the bottom plate A3 and extended into the long rod ratchet-wheel T2; U, a ratchet on the upper end of the vibratory frame G and adapted to work into the toothed racks R R3; U2, a pivot in the vibratory-frame ratchetU; V, a curved-spring paper-guide around the front part of each end of the platen N; and V2, a 4bead or protuberance on the inner side of each spring-guide V, next to the platen N.

The movement of the carriage M from right to left is called the forward movement and from left to right the backward movement. In writing the forward movement is only a letter-space distance at a time,- and it is called the letter-space movement. This movement is controlled and regulated bythe rightangled vibratory frame G, the vibratory holding-ratchet U, and the toothed racks R R3, and they are called, respectively, the letterspace vihratory frame, the letter space ratchet,. and the letter-space racks.

The functionof key-lever springs in such machines is to hold the levers in position or to restore them to position when depressed after the pressure is removed. For this purpose in the invention described the wire loop-spring C5 astride the fore end ,of each key-lever C, and extended down in front of, under, and to the rear of the fulcrum A5 to and on the bottom plate A3, is efficient, light, and cheap, adapted to go between the guidepins A, to be 'put on or taken off readily, to hold itself in place when on, to hold the lever in position, or tov restore it thereto when depressed and released.

The function of space-key levers is to work the letter-space mechanism. It is desirable that they should work like the type-keys, that both should move in the same manner and direction. For this purpose in the invention described the spacekey levers H are pivoted at the fore ends nearly or quite in line with the type-key-lever fulcrum A3, and the space-keys H3 andtype-keys C4 are in the same plane, and the actions of both are alike. Y

The function of the supplementary springs H5 is to enable the carriage M to move forward when desired without obstruction. The depression of any type-key lever C will rock the letter-space vihratory frame G downward and forward and vibrate the ratchet U out of the rear rack R3 into the front rack R, which will release the rear rack, which the rack-spring R4 will then draw forward a typespace or letter-space distance till. arrested by a stop on the front rack, andwhen released from pressure the key-lever will rise and allow the vibratory frame to rock again to place, upward and backward, and vibrate 'the ratchet back again out of the front rack into the rear rack, which will release the front rack, which the driving-power S T will then draw forward with the carriage M the same distance till arrested by a stop on the rear rack. In this way the carriage and substance to be written on may move forward, but only a letter-space distance at a time, for while .the hinge U2 will allow the ratchet U to turn in one direction that of the backward movement of the carriage and allow the carriage lto move freely back to place from any point at any time, a stop for the purpose will not allow the ratchet to turn in the reverse direction, and thus the ratchet in the direction of the forward movement is a holding-ratchet,

4and as the depression of any type-key lever will vibrate it only from one rack to the other it will constantly hold the racks and'carriage from moving forward, except a letter-space distance at a time, as described; but it is sometimes desirable that the carriage should move forward as freely as backward. Ordinarily the depression and release of the spacekey levers H will vibrate the ratchet U only tance, which will vibrate the ratchet Uv forward entirely out from both racks R3 R, which will release both racks and carriage, which will allow the carriage to move as freely forward as backward.

The new devices herein shown and described, but not clailned, are the subjects ot` ICO Io between the two ends and extended down in front and under and to the rear of the fulcrum.

2. In a type-Writing machine, the combination 0f a supplementary spring with lthe space-key lever and letter-space vbratory I5 frame.

GEORGE WV. N. YOST.

WVitnesses:

WM. BRO. SMITH, CHAS. C. GILL. 

